Optical absorption and fluorescence properties of Tm3+-doped K–Mg–Al phosphate glasses for laser applications

Praveena, R.; Jang, Kyoung Hyuk; Jayasankar, C.K.; Seo, Hyo Jin

doi:10.1016/j.jallcom.2010.02.007

Cited by 22 publications

(9 citation statements)

References 32 publications

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“…All the specimens demonstrated high transparency around 75% and had Tm 3+ absorption peaks at wavelengths of approximately 360 nm, 470 nm, 650 nm, 680 nm, and 770 nm. These transitions are assigned to 3 H 6 → 1 D 2 , 3 H 6 → 1 G 4 , 3 H 6 → 3 F 2 , 3 H 6 → 3 F 3 , and 3 H 6 → 3 H 4 respectively …”

Section: Resultsmentioning

confidence: 99%

Growth of Tm³⁺-Doped Y₂O₃, Sc₂O₃, and Lu₂O₃ Crystals by the Micropulling down Technique and Their Optical and Scintillation Characteristics

Fukabori

Chani

Kamada

et al. 2011

Crystal Growth & Design

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Single -crystal growth of Tm 3þ -doped Y 2 O 3 , Sc 2 O 3 , and Lu 2 O 3 sesquioxides, with a melting point around 2400 °C, by the micropulling down technique is reported. Crystal quality and composition of the crystals were evaluated by rocking curve and energy-dispersive X-ray (EDX) analyses, respectively. Optical properties including optical transmittance and photoluminescence decay profiles were also examined. Furthermore, scintillation performance of the crystals including pulse height spectra and radioluminescence spectra under R-ray and γ-ray excitation was evaluated.

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Section: Resultsmentioning

confidence: 99%

Growth of Tm³⁺-Doped Y₂O₃, Sc₂O₃, and Lu₂O₃ Crystals by the Micropulling down Technique and Their Optical and Scintillation Characteristics

Fukabori

Chani

Kamada

et al. 2011

Crystal Growth & Design

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“…The glass is of great significance in the market for high average energy and high peak power solid state laser applications (Ref. 121 and references Therein). The drawbacks of these systems are the short lifetime of the excited states and non-radiative decay paths.…”

Section: Luminescence Uc and DC In Fluoride Glasses And Crystalsmentioning

confidence: 99%

Nanocrystallisation in oxyfluoride systems: mechanisms of crystallisation and photonic properties

Pablos-Martín

Durán

Pascual

2012

International Materials Reviews

150

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Rare earth (RE) doped oxyfluoride glass ceramics possess interesting optical properties with applications in telecommunications and optoelectronics, such as solid state lasers, optical amplifiers, etc. These materials combine the transparency and mechanical and chemical resistance of aluminosilicate glasses with the low phonon energy and facile incorporation of RE ions in the fluoride crystals. The incorporation of RE ions in the crystalline phases enhances the laser emission intensity, a major property of these materials. Transparency is achieved when crystal size is in the nanometric scale, usually below 40 nm, which avoids light scattering. A strict control of the nucleation and crystal growth processes is therefore necessary which requires a deep knowledge of the crystallisation mechanisms. The great activity and publications in this field in the last decades merit a review providing a comparative study of the different nanoglass ceramic systems, their structural and optical characterisation and their main properties and applications. This is the objective of this review paper which includes 232 references. A general discussion on glass nucleation and crystallisation theories and more relevant crystallisation parameters and characterisation techniques are put forward in the first section of the review, focused on nanocrystallisation processes in oxyfluoride systems. In the second section, the principal RE doped glass ceramics are presented. After a general introduction about the luminescence processes, including up-and down-conversion, the behaviour of RE elements in glasses and crystals are discussed. Glass ceramic compositions have been divided as follows: glass ceramics with a glass composition following Wang and Ohwaki's oxyfluoride glass ceramic, 1 ; and glass ceramics with different matrix compositions, arranged by crystalline phases. Relevant properties, mainly optical and laser, are described in each system along with the most relevant applications of these materials.

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“…In order to explain the type of energy transfer mechanism, the decay curves are analyzed in the framework of the Inokuti-Hirayama (IH) model following the same procedure given in Ref. 58. The non-exponential decay curves are well-fitted to the IH model for S = 6, which confirms the nature of interaction between Nd 3+ ions is dipole-dipole.…”

Section: Resultsmentioning

confidence: 77%

Optical Absorption and NIR Photoluminescence of Nd3+-Activated Strontium Phosphate Glasses

Prasad¹,

Vijaya

Babu³

et al. 2020

Journal of Elec Materi

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Strontium phosphate glasses with various concentrations of Nd 2 O 3 have been prepared by melt quenching method. Absorption and photoluminescence spectra and lifetime measurements have been carried out to obtain the optical properties of these glasses. From the absorption spectrum, intensity and radiative parameters have been evaluated using Judd-Ofelt analysis. Nearinfrared photoluminescence spectra consist of three bands centered at 875 nm, 1056 nm and 1327 nm, among which the highest intensity has been noticed for the band at 1056 nm that corresponds to the 4 F 3/2 fi 4 F 11/2 transition of Nd 3+ ion. Laser parameters such as branching ratio, band width, stimulated emission cross section and gain bandwidth for the 4 F 3/2 fi 4 F 11/2 transition are found to be 0.52, 28 nm, 2.31 9 10 À20 cm 2 and 6.5 9 10 À26 cm 3 , respectively. Decay curves of the 4 F 3/2 level of Nd 3+ ions exhibit a single exponential nature at lower concentrations, while they become non-exponential at higher concentrations (‡ 0.1 mol.%) due to non-radiative energy transfer processes. This feature is also associated with shortening of lifetime from 307 ls to 82 ls when the Nd 3+ ion concentration increases from 0.1 mol.% to 4.0 mol.%. The results have been compared with those of barium and magnesium phosphate glasses and commercial glasses. The results suggest that these glasses have potential applications as infrared laser materials at 1.05 lm.

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Optical absorption and fluorescence properties of Tm3+-doped K–Mg–Al phosphate glasses for laser applications

Cited by 22 publications

References 32 publications

Growth of Tm³⁺-Doped Y₂O₃, Sc₂O₃, and Lu₂O₃ Crystals by the Micropulling down Technique and Their Optical and Scintillation Characteristics

Growth of Tm³⁺-Doped Y₂O₃, Sc₂O₃, and Lu₂O₃ Crystals by the Micropulling down Technique and Their Optical and Scintillation Characteristics

Nanocrystallisation in oxyfluoride systems: mechanisms of crystallisation and photonic properties

Optical Absorption and NIR Photoluminescence of Nd3+-Activated Strontium Phosphate Glasses

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Optical absorption and fluorescence properties of Tm3+-doped K–Mg–Al phosphate glasses for laser applications

Cited by 22 publications

References 32 publications

Growth of Tm3+-Doped Y2O3, Sc2O3, and Lu2O3 Crystals by the Micropulling down Technique and Their Optical and Scintillation Characteristics

Growth of Tm3+-Doped Y2O3, Sc2O3, and Lu2O3 Crystals by the Micropulling down Technique and Their Optical and Scintillation Characteristics

Nanocrystallisation in oxyfluoride systems: mechanisms of crystallisation and photonic properties

Optical Absorption and NIR Photoluminescence of Nd3+-Activated Strontium Phosphate Glasses

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Growth of Tm³⁺-Doped Y₂O₃, Sc₂O₃, and Lu₂O₃ Crystals by the Micropulling down Technique and Their Optical and Scintillation Characteristics

Growth of Tm³⁺-Doped Y₂O₃, Sc₂O₃, and Lu₂O₃ Crystals by the Micropulling down Technique and Their Optical and Scintillation Characteristics